MESON Chess Problem Database

Problem Display
PID: 23214 (4k1K1/7r/8/8/3Q3b/8/2b5/3R4 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

4k1K1/7r/8/8/3Q3b/8/2b5/3R4

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Ke7
      • 2.Qe5#
    • 1...Rh5
      • 2.Qd7#
    • 1...Rh6
      • 2.Qd7#
    • 1...Rd7
      • 2.Qxd7#
    • 1...Re7
      • 2.Qd8#
    • 1...Be1
      • 2.Qd8#
    • 1...Bf2
      • 2.Qd8#
    • 1...Bg3
      • 2.Qd8#
    • 1...Be7
      • 2.Qd7#
    • 1...Bd8
      • 2.Qxd8#
  • Tries
    • 1.Qe4+?
      • 1...Re7
        • 2.Qa8#
      • 1...Be7
        • 2.Qc6#
      • 1...Bxe4!
  • Keys
    • 1.Qe5+!
      • 1...Re7
        • 2.Qb8#
      • 1...Be7
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • K(d);P-FLIGHT::QAR2(B)
    • R(c);N_GUARD::QAB1(B)
    • R(c);N_GUARD::QAB1(B),XR(c)
    • R(c);S_CUTB(b)::QAR1(B)
    • B(b);N_GUARD::QAR1(B)
    • B(b);S_CUTR(c)::QAB1(B)
    • B(b);N_GUARD::QAR1(B),XB(b)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • R(c);P_SPINR(c),SBLOCK,S_CUTB(b)::QAR(B)
        • B(b);P_SPINB(b),SBLOCK,S_CUTR(c)::QAB(B)
      • Refutation
        • B(a);XQ(B)
  • Actual
    • Q(B);CHECK
    • Vars
      • R(c);P_SPINR(c),SBLOCK,S_CUTB(b)::QAR(B)
      • B(b);P_SPINB(b),SBLOCK,S_CUTR(c)::QAB(B)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).